Apparatus for holding and cooling the bulbs of electric lamps.



-s. a. RHODES. APPARATUS FOR HOLDING AND COOUNG THE BULBS OF ELECTRIC LAMPS.

APPLICATION FILED FEB- 20. l9i 5. V

1,15,18w 1 Pate'nt ed JuJy 6,1915.

tinirnn strains ha r SAMUEL G. RHODES, OF NEW YORK, N. Y.

Specification of Letters Patent.

Patented July e, 1915.

Application filed February 20, 1915. Serial N 0. 9,541.

To all whom it may concern:

, comprises a tubular shell for supporting the bulb, which shell also forms a chimney for the heated air arising therefrom, a translucent inclosing globe supported on said shell, having an opening communicating with said shell and inclosing said bulb, and partitions in said shell so constructed as to form an air passage through which an annular air current enters the globe opening and is deflected upon said bulb-andpreferably upon the neck thereofto cool the same. The heated air current then passes ulplwlard through the chimney formed by the s e I The accompanying drawing is a vertical section of my device.

1 generally designates a gas filled incandescent lamp of known construction, in which 2 is the filament and 3 the glass bulb formed with a cylindrical neck 4. The lamp socket/5 is supported upon a block 6 of insulating material, which in turn is supported upon a bracket 7 secured in the tubular metallic shell 8. The lower portion of said shell is outwardly flared and within it is secured a flat metal ring 10, in the central opening of which is secured a downwardly tapering duct 11. To the lower circumferential edge of the shell is attached a vertical metal ring 12. Below the ring 10 is a parallel flat ring 13 secured by rods, one of which is shown a 14. Between the rings 10 and 13 is a band of wire gauze 15. Said ring 13 in turn carries a vertical ring 16, which is parallel to ring 12. The width of ring 13 is less than that of ring 10, so that a free annular channel for the passage of air is formed between the rings 12 and 16, then between the rings 10 and 13, and finally between the inner edge of ring 13 and the annular duct 11.

Within the ring 16 is a band of solid metal which receives the supporting ring 17 for the glow-lamp globe 18. The upper of which the following is a grooved portion of said globe is secured to the ring 17 by the usual set screws, one of which is indicated in dotted lines .at 19. Said ring at one side has ahinge 20 supported by an arm 21 which enters a metal loop 22 secured to the shell 8. On the opposite side said ring has a notched arm 23 which engages with a swinging loop 24 supported on the shell. By releasing the loop 2 1 from arm 23, the globe 18 may be swung downwardly on its hinge sufficiently to'permit access to the lamp 1. The means above described for holding the globe so as to provide for-access to the lamp forms no part of my present invention, and any other known device for the purpose may be substituted.

The diameter of the opening in the upper part of the globe is to be such that a space will be left between said globe and the duct 11, through which the entering air may pass intosaid globe as an annular sheet which after impinging upon the lamp. bulb, passes upward through the duct 11, as indicated by the arrows in the drawing.

The upper portion of shell 8 is enlarged, as shown at 25, and has a circumferential flange 26, to which is secured, or which may have integral with it, an annular corrugated plate 27 upon which rests a flat ring 28, which receivesthe lower flanged edge of a tapering duct 29, the upper edge of which duct may be outwardly flared. A hood 30 is disposed above the duct 29, having its flanged lower edge connected by rods, one of which is shown at 31, to flange 26. Between said hood and ring 28 is interposed a vertical ring 32 of wire gauze. A socket 34 has arms 35 by which it is connected-to the hood and is internally threaded to engage the threaded end of any suitable supporting rod for the whole device. It will be observed that there is a free passage for the escape of hot air between the hood 30 and ring 28, and in said passage is a band 32 of wire gauze to prevent entrance of insects.

The operation is as follows: The air heated by the lamp normally rises through the duct 11, shell 8 which forms a chimney and duct 29, and escapes through the screen 32. The draft thus causes air to be drawn into the globe 18 in an annular sheet through.

the passage contained in the shell formed by so much of the shell 8 as lies below ring 9. Before passing upward through the duct 11, this air strikes the neck l of the lamp bulb, and so maintains a constant cooling current directed thereupon, whereb the temperature of said neck and of the con nection between neck and lamp socket is reduced and kept below a degree which. would cause breakage of the bulb at said neck..-

The wire gauze screen 15 keeps out a portion of the dust and moisture which may be in the air and prevents entrance of insects. If desired, an'opening 36 may also be made in the lower portion of the globe.

I claim 1. A tubular @shell, a translucent globe supported on one end thereof and having an opening communicating with said shell, a

lamp bulb supported within said shell and extending into said globe, and partitions in said shell forming anannular'passage for conducting .a1r into said globe openmg and eonstructed to deflect. said entering a1r to impinge upon said bulb. V

2. A tubular shell, a ring fixed in llllG/ lower portion of saidshell, a downwardly tapering duct supportedin said ring, a secthe said parts being constructed and arand a lamp bulb supported ranged so that an air current entering said globe opening through the passage formed shall first impinge upon said lamp bulb, and then pass upwardly through said duct to said shell.

In testimony whereof I have aiiixed my signature in presence of two witnesses.

SAMUEL G. RHODES. \Vitnesses Gnnrnnnn T. PORTER, MARY T. MoGAnRY.

by the spaces between said rings and shell, I 

